AT24C16B データシートの表示（PDF） - Atmel Corporation

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AT24C16B

Two-wire Serial EEPROM

Atmel Corporation 

AT24C16B

3. Pin Description

SERIAL CLOCK (SCL): The SCL input is used to positive edge clock data into each EEPROM

device and negative edge clock data out of each device.

SERIAL DATA (SDA): The SDA pin is bidirectional for serial data transfer. This pin is open-

drain driven and may be wire-ORed with any number of other open-drain or open-collector

devices.

DEVICE/PAGE ADDRESSES: The AT24C16B does not use the device address pins, which lim-

its the number of devices on a single bus to one.

WRITE PROTECT (WP): The AT24C16B has a write protect pin that provides hardware data

protection. The write protect pin allows normal read/write operations when connected to ground

(GND). When the write protect pin is connected to VCC, the write protection feature is enabled

and operates as shown in Table 3-1.

Table 3-1.

WP Pin

Status

At VCC

At GND

Write Protect

Part of the Array Protected

24C16B

Full (16K) Array

Normal Read/Write Operations

4. Memory Organization

AT24C16B, 16K SERIAL EEPROM: Internally organized with 128 pages of 16 bytes each, the

16K requires an 11-bit data word address for random word addressing.

3

5175D–SEEPR–6/08

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